Understood, ChristiaanJ, and I'm not trying to get too far ahead of the problem.
The problem with electrical ghost faults is the damnable time one has in replicating them. I've had gripes and write-ups that repeatedly got signed off as "could not replicate on deck" which sometimes, because they could not be replicated, were very difficult to trouble shoot.
That is also true for spurious signals and strange behavior in computer driven equipment in aircraft. Sometimes, the only maintenance action was to reboot the damned thing.
If the QAR is available, that raises the odds for successful analysis, but it is no guarantee.